flicking cardboard rings
This is how to flick cardboard rings with a rubber band
This is a pattern for making them. Use thin card. The triangles are for tracing onto tissue paper; if you stick a triangle onto a ring it goes further.
This is an electric ring flicker
The width of the slot needs to be quite accurate or it jams, also the rings need to be quite accurately made. A simpler one can be made just by attaching a bit of bent wire to the motor but the discs have to be fed in individually with your other hand.
rubber band gatling gun
explanation of coriolis force
good site for motors etc
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